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2. Tap and die - Wikipedia

   en.wikipedia.org/wiki/Tap_and_die

   where is the tap drill size, is the major diameter of the tap (e.g., 3 ⁄ 8 in for a 3 ⁄ 8-16 tap), and / is the thread pitch (1 ⁄ 16 inch in the case of a 3 ⁄ 8-16 tap). For a 3 ⁄ 8-16 tap, the above formula would produce 5 ⁄ 16, which is the correct tap drill diameter. The above formula ultimately results in an approximate 75% thread.

3. List of drill and tap sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

   Schematic of a machine tap. Below is a comprehensive drill and tap size chart for all drills and taps: Inch, imperial, and metric, up to 36.5 millimetres (1.44 in) in diameter. In manufactured parts, holes with female screw threads are often needed; they accept male screws to facilitate the building and fastening of a finished assembly.

4. List of DIN standards - Wikipedia

   en.wikipedia.org/wiki/List_of_DIN_standards

   Sets of taps – Sets of 3 taps for metric coarse ISO-threads M1 to M68: Active: DIN 371: Machine taps with reinforced shank for coarse pitch metric ISO-threads M1 to M10 and fine pitch metric ISO-threads M1 × 0,2 to M10 × 1,25: Active: DIN 374: Machine screwing taps for fine pitch metric ISO-threads M3 × 0,2 to M52 × 4: Active

5. Screw thread - Wikipedia

   en.wikipedia.org/wiki/Screw_thread

   Thus a tap designated with an H limit of 3, denoted H3, would have a pitch diameter 0.0005 × 3 = 0.0015 inch larger than base pitch diameter and would thus result in cutting an internal thread with a looser fit than say an H2 tap. Metric uses D or DU limits which is the same system as imperial, but uses D or DU designators for over and ...

6. Idaho abortion trafficking law partly revived by US appeals court

   www.aol.com/news/idaho-abortion-trafficking-law...

   (Reuters) -Idaho can enforce a first-of-its-kind "abortion trafficking" law against those who harbor or transport a minor to get an abortion out of state without parental consent, a federal ...

7. Talk:List of drill and tap sizes - Wikipedia

   en.wikipedia.org/wiki/Talk:List_of_drill_and_tap...

   The metric screw tap and clearance sizes are largely missing, and those clearance hole sizes that are present are more often incorrect; e.g. M5 x 0.8 has 5.1 mm as close fit, but this would be an interference fit, all sources have 5.3 mm. (0.1 mm is below the sum of surface roughness and tolerance of the screw and clearance drill diameter ...